Antifouling and anticorrosive composition.



FIFSEOI ZUISHO HOTTA, OF TOKYO, JAPAN.

ANTIFOULING AND ANTICORI tOSIVE COMPOSITION.

Application filed August 21, 1908.

Specification of Letters Patent.

Patented March 30, 1909.

Serial No. 449,663.

To all whom it may concern:

Be it known that I, ZUISHO HOTTA, a subject of the Emperor of J a an, residing at No. 7 Ichome Tamachi ibaku, Tokyo, Japan, have invented a new and useful composition of matter to be used as an antifouling and anticorrosive lacquer specially suitable for the protection of ships bottoms, although the same may be used with advantage as a coating for metallic articles that are su bjectto corrosive influences, and the chief object of this invention is to rovide a comosition of the class referre to that shall include a large percentage of poisonous salts without disturbing the viscosity or interfering with the rapid drying and durable quality of the said composition, of which the following is a specification.

My composition consists of the following named ingredients combined in about the proportions stated viz:

Urushi (Japanese lac uergum) 100 pounds.

S 0 id mineral salts poisonous to the micro-organism ThymoL- 100 pounds. 10 pounds.

altered as the articular conditions may require, provide however that the conditions are such that the said salts act both as the drier or fast hardening re-agent for the lacquer, and also as the poison or antiseptic for micro-organism, and so that the thymol (which is perhaps the most important ingredient in this invention) acts as a re-agent to render the composition of proper fluidity or not too viscous, while its slight and almost imperceptible solubility in water admits the poisonous ingredients to difiuse all over the surface of the ships bottom when the latter is immersed in Water slowly but continuously, thus protecting the surface from fouling.

In using the above named composition the metallic surface to be treated should first be freed from rust and other impurities, and then the said composition is evenly spread over it with a roper brush. The composition dries and liardens in a few hours and, when hardened, the composition is a per fect insulator to galvanic action and protects the metallic surface from rusting.

hat I claim, and desire to secure by Letters-Patent is The herein-described composition of matter, consisting of urushi (Japanese lacquer gum), salts poisonous to micro-organism, and thymol, substantially as described and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ZUISHO HOT'IA. Witnesses:

KIHACHINO MATSUKI, MARION ELLIOT PITMAN.

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